EP0095148A2 - Bobine de film photographique - Google Patents

Bobine de film photographique Download PDF

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Publication number
EP0095148A2
EP0095148A2 EP83104975A EP83104975A EP0095148A2 EP 0095148 A2 EP0095148 A2 EP 0095148A2 EP 83104975 A EP83104975 A EP 83104975A EP 83104975 A EP83104975 A EP 83104975A EP 0095148 A2 EP0095148 A2 EP 0095148A2
Authority
EP
European Patent Office
Prior art keywords
film
wall
spool
engagement
winding shaft
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP83104975A
Other languages
German (de)
English (en)
Other versions
EP0095148A3 (fr
Inventor
Akira Yanagisawa
Chuuji Iino
Toshiyuki Ikariya
Kiyohiko Takahashi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Konica Minolta Inc
Original Assignee
Konica Minolta Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Konica Minolta Inc filed Critical Konica Minolta Inc
Publication of EP0095148A2 publication Critical patent/EP0095148A2/fr
Publication of EP0095148A3 publication Critical patent/EP0095148A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B17/00—Details of cameras or camera bodies; Accessories therefor
    • G03B17/28—Locating light-sensitive material within camera
    • G03B17/30—Locating spools or other rotatable holders of coiled film
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
    • G03C3/00—Packages of films for inserting into cameras, e.g. roll-films, film-packs; Wrapping materials for light-sensitive plates, films or papers, e.g. materials characterised by the use of special dyes, printing inks, adhesives
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B2217/00—Details of cameras or camera bodies; Accessories therefor
    • G03B2217/26—Holders for containing light-sensitive material and adapted to be inserted within the camera
    • G03B2217/261—Details of spools

Definitions

  • the present invention relates to a spool for photographic film, which improves in the film-spool attachment strength.
  • the so-called 35mm film (No. 135 when in a cartridge) which is used for 35mm camaras or so-called half-size cameras is set in such a manner that the end thereof is attached to a spool provided rotatably in a cylindrical cartridge.
  • the conventional systems for attaching the end of the film to the spool the following systems are known: a system wherein a sheet of adhesive paper with an adhesive agent applied onto one surface thereof is rolled around the spool and the end of film is attached between the ends of the adhesive paper, and a system wherein engagement holes made in the end of the film are engaged with engagement pawls formed on the winding shaft of the spool.
  • the critical force in which the film disengages from the spool due to damage, etc. when the film attached to the spool is pulled in the longitudinal direction thereof, i.e. the film-spool attachment strength of the former system is much larger than the latter.
  • This system has such problems, however, that the film is partially stained by the adhesive agent, that the process wherein the end of the film is he1d ⁇ between the ends of the adhesive paper is complicated, and that the adhesive force is deteriorated by the variances with time of the adhesive agent.
  • the film-spool attachment strength is large, (2) the film is inserted easily and surely, and (3) the film does not disengage from the spool after it has been inserted.
  • the system which has so far been known has an inferior film-spool attachment strength to that in the system using adhesive paper, described above, and the system using two engagement holes has the problem that one of the engagement pawls is liable to disengage from the corresponding engagement hole.
  • the present invention proposes a spool satisfying the above three requirements, based on the theoretical analysis of the shape and dimensions of the engagement pawls of the spool and the engagement holes of the film, and on experimental confirmation thereof.
  • the spool proposed by the present invention is formed in such a manner that a film-insertion slit is provided in the winding shaft of the spool, and that two engagement pawls are provided separately from each other in the axial direction of the winding shaft, in part of one of the upper and lower walls of the film-insertion slit and facing the other wall, while a relatively narrow film-presser rib is provided in part of the other wall facing the first wall, between the two engagement pawls.
  • Each engagement pawl has an inclined part ascending toward the other wall gradually in the direction of film-insertion, and a horizontal pawl part continuing from the inclined part.
  • This horizontal pawl part is shaped in accordance with part of a vertually oval engagement hole formed in the end of the film, and has a film engagement section inclined toward the first wall and toward the film-insertion side of the slit, and is separated a distance slightly larger than the thickness of the film from the first wall.
  • the film-presser rib has an inclined surface descending toward the first wall gradually in the direction of film-insertion, and a horizontal surface continuing from the inclined surface.
  • a front end 1a is a narrow part to be inserted into a slot of a take-up reel when the film is loaded, while a rear end 1b serves as an attachment part to the spool, which will be described later.
  • the attachment part 1b having a width W of 15 - 17 mm, is provided with two engagement holes 2 and 2', which are recommended to have an oval or elliptical shape for easy engagement with engagement pawls, preferably an oval shape for reasons of preparation.
  • the minor axis d of the engagement holes 2 and 2' is within 0.15 4 d/w ⁇ 0.3, determined by theoretical analysis, so as to increase the film-spool attachment strength.
  • the difference between the width of the engagement holes 2 and 2' and the width of the engagement pawls of the spool which will be described later, is recommended to be less than 1 mm.
  • Figures 2 to 8 show the structure of the film spool according to the present invention.
  • Figure 2 is a perspective view of the spool
  • Figure 3 is a perspective view of the spool with part of which removed
  • Figure 4 is a front view of the spool
  • Figure 5 is a plan view of the spool with part of which removed
  • Figure 6 is a back view of the same spool
  • Figure 7 is a section taken along the line VII-VII of Figure 4
  • Figure 8 is a section taken along the line VIII-VIII of Figure 4.
  • the spool is provided with flanges 4 and 4', which are located near each end of a winding shaft 3 around which the film is rolled.
  • the spool is also provided with a film-insertion slit 5, which is located in a part of the winding shaft 3 between the two flanges 4 and 4'.
  • the film insertion slit 5 is formed through the winding shaft 3 and pierces the shaft at right angles to the axial line thereof.
  • the upper wall 6 is provided with a film-presser rib 8 formed nearly in the center of the longitudinal direction of the insertion slit 5, while the lower wall 7 is provided with two engagement pawls 9 and 10.
  • a concavity 11 is formed between these engagement pawls.
  • Ribs 6a and 7a extending along the length of the spool are provided nearly in the center of the outside of the upper and lower walls 6 and 7, respectively.
  • the engagement pawls 9 and 10 have the same shape, an enlarged view of the pawl 9 is shown in Figure 9, while a section thereof taken along the line X-X is shown in Figure 10.
  • the engagement pawl 9 has a pawl part 9a extending horizontally, and an inclined part 9b ascending gently and gradually toward the upper wall 6 from the film-insertion side.
  • the pawl part 9a has a slanting end whose angle of inclination 6 is less than 90 degrees, and preferably about 60 degrees. An end thus inclined facilitates the engagement of the film with the pawl part 9a.
  • the lower surface F of the pawl part 9a is formed parallel to the upper surface E thereof in the horizontal direction.
  • the distance h from the lower wall 7 to the lower surface F of the pawl part 9a is preferably made to be slightly larger than the thickness (about 0.15 mm) of the film, i.e. at least 0.3 mm, in view of the life of the forming mold, etc. It has been confirmed by experiments, however, that the film-spool attachment strength decreases as the distance h increases. In addition, it has also been confirmed by experiments that the film-spool attachment strength decreases sharply when the length L in the horizontal direction of the lower surface F of the pawl part 9a is less than 1 mm. This means that the length L in the horizontal direction is recommended to be at least 1 mm, preferably 1 mm.
  • the inclined part 9b of the engagement pawl 9 has an angle of inclination of preferably about 25 degrees to the lower wall 7, and the length along the inclined surface is preferably about 5 mm.
  • the film-presser rib 8 formed on the upper wall 6 has a horizontal part 8a and an inclined part 8b descending gently and gradually toward the lower wall 7 from the film-insertion side.
  • This presser rib 8 prevents the film from disengaging from the engagement pawls after it has been engaged therewith, and the inclined part 8b, together with the inclined parts of the engagement pawls, bends the central part of the film gradually when the film is inserted, thus applying a downward force to the engagement part 1b of the film. Accordingly, the function of preventing the disengagement decreases when the height of the presser rib 8 is too small, while its resistance against the insertion of film becomes large when it is too large.
  • the height m of the presser rib should also be fixed in relation to the height n of the film-insertion slit, and thus it is preferable to provide the following relations between them when the height of the engagement pawls is l.
  • n and m have been fixed at 2.3 mm and 1.5 mm, respectively.
  • the width of the presser rib 8 of this embodiment has an effect on its resistance against the insertion of the film, that is, the resistance against insertion increases as the width is increased.
  • the width has been fixed at 1.2 mm in the present embodiment.
  • the inclined parts of the engagement pawls 9 and 10 start to engage with the engagement holes 2 and 2' of the film, and when shoulder parts 1c of the film 1 are inserted as far as positions at which they touch both end parts of the winding shaft 3 of the spool, the engagement holes 2 and 2' of the film 1 engage with the engagement pawls 9 and 10 by the force of restoration of the bent film itself.
  • the film is easily engaged with the engagement pawls, because the ends of the pawl parts are inclined, and thus it is set simply in the position shown by the dot- and dash-line in Figure 3.
  • the film is attached firmly to the spool in this way, and it is held firmly by the presser rib 8 after being engaged.
  • the present invention proposes a spool constituted in such a manner that, in a spool for photographic film having a winding shaft for attaching the end of the film and winding the film thereon and a pair of flanges checking the movement of the film wound round said winding shaft, in the axial direction of the shaft, a film insertion slit is provided between the two flanges of the winding shaft, and two engagement pawls are provided separately from each other in the axial direction of the winding shaft, in part of one of the upper and lower walls of said film-insertion slit facing the other wall, while a comparatively narrow film-presser rib is provided in part of the other wall facing the first wall between said two engagement pawls; each of said engagement pawls has an inclined part ascending toward the other wall gradually in the direction of film-insertion and a horizontal pawl part continuing from said inclined part; each of said horizontal pawl parts is shaped in accordance with part of a nearly oval engagement hole formed in the end of
  • the film is attached easily and surely to the spool, without disengaging therefrom after attachment. Moreover, the film-spool attachment strength obtained when the film is attached to the spool is increased markedly in comparison with that obtained by a conventional pawl engagement system of this kind, being equal to that obtained by an attachment system wherein adhesive paper is used.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Details Of Cameras Including Film Mechanisms (AREA)
  • Storage Of Web-Like Or Filamentary Materials (AREA)
EP83104975A 1982-05-21 1983-05-19 Bobine de film photographique Withdrawn EP0095148A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP84961/82 1982-05-21
JP8496182A JPS58203436A (ja) 1982-05-21 1982-05-21 写真フイルム用スプ−ル

Publications (2)

Publication Number Publication Date
EP0095148A2 true EP0095148A2 (fr) 1983-11-30
EP0095148A3 EP0095148A3 (fr) 1985-12-11

Family

ID=13845219

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83104975A Withdrawn EP0095148A3 (fr) 1982-05-21 1983-05-19 Bobine de film photographique

Country Status (2)

Country Link
EP (1) EP0095148A3 (fr)
JP (1) JPS58203436A (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3729755A1 (de) * 1986-09-05 1988-03-31 Fuji Photo Film Co Ltd Photographische filmpackung und verfahren zu deren herstellung
US4831398A (en) * 1987-08-19 1989-05-16 Fuji Photo Film Co., Ltd. Photographic film package and method of making the same
EP0342372A2 (fr) * 1988-05-19 1989-11-23 Minnesota Mining And Manufacturing Company Bobine, cassette et méthode de fixation d'un film photographique
EP0414150A2 (fr) * 1989-08-21 1991-02-27 Eastman Kodak Company Bobine pour film photographique ou d'autres matériaux en forme de bande
EP0467154A2 (fr) * 1990-07-17 1992-01-22 Agfa-Gevaert AG Bobine pour support d'enregistrement en forme de bande, en particulier pour des films photographiques
US5295635A (en) * 1992-08-28 1994-03-22 Eastman Kodak Company Spool to film attachment
US5416548A (en) * 1991-10-09 1995-05-16 Fuji Photo Film Co., Ltd. Photographic film strip, photographic film cassette containing the same, and camera for use therewith
US6447176B2 (en) 1999-03-05 2002-09-10 West Bend Film Company, Llc Film canister device for use in a film package assembly and a method for loading a camera therewith and a camera loadable thereby

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0552850U (ja) * 1991-12-18 1993-07-13 コニカ株式会社 パトローネ入り写真フィルム
JPH05341444A (ja) * 1992-02-24 1993-12-24 Fuji Photo Film Co Ltd 写真フィルム用スプール

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE566676A (fr) *
US3361380A (en) * 1966-01-25 1968-01-02 Fuji Photo Film Co Ltd Spool for photographic film
FR2006593A1 (fr) * 1968-04-20 1969-12-26 Fuji Photo Film Co Ltd

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52102032A (en) * 1976-02-20 1977-08-26 Fuji Photo Film Co Ltd Film winding process and cartridge

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE566676A (fr) *
US3361380A (en) * 1966-01-25 1968-01-02 Fuji Photo Film Co Ltd Spool for photographic film
FR2006593A1 (fr) * 1968-04-20 1969-12-26 Fuji Photo Film Co Ltd

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8717178U1 (de) * 1986-09-05 1988-05-26 Fuji Photo Film Co., Ltd., Minami-Ashigara, Kanagawa Photographische Filmpackung
DE3729755A1 (de) * 1986-09-05 1988-03-31 Fuji Photo Film Co Ltd Photographische filmpackung und verfahren zu deren herstellung
US4831398A (en) * 1987-08-19 1989-05-16 Fuji Photo Film Co., Ltd. Photographic film package and method of making the same
EP0342372A2 (fr) * 1988-05-19 1989-11-23 Minnesota Mining And Manufacturing Company Bobine, cassette et méthode de fixation d'un film photographique
EP0342372A3 (en) * 1988-05-19 1990-07-25 Minnesota Mining And Manufacturing Company Spool, cartridge and method for fastening a photographic film
EP0414150A3 (en) * 1989-08-21 1992-05-06 Eastman Kodak Company Spool for photographic film or other web material
EP0414150A2 (fr) * 1989-08-21 1991-02-27 Eastman Kodak Company Bobine pour film photographique ou d'autres matériaux en forme de bande
EP0467154A2 (fr) * 1990-07-17 1992-01-22 Agfa-Gevaert AG Bobine pour support d'enregistrement en forme de bande, en particulier pour des films photographiques
EP0467154A3 (en) * 1990-07-17 1992-08-05 Agfa-Gevaert Ag Spool for an information carrier tape, especially for photographic films
US5416548A (en) * 1991-10-09 1995-05-16 Fuji Photo Film Co., Ltd. Photographic film strip, photographic film cassette containing the same, and camera for use therewith
US5295635A (en) * 1992-08-28 1994-03-22 Eastman Kodak Company Spool to film attachment
US6447176B2 (en) 1999-03-05 2002-09-10 West Bend Film Company, Llc Film canister device for use in a film package assembly and a method for loading a camera therewith and a camera loadable thereby
US7039306B2 (en) 1999-03-05 2006-05-02 West Bend Film Company Llc Film canister device for use in a film package assembly and a method for loading a camera therewith and a camera loadable thereby

Also Published As

Publication number Publication date
JPS58203436A (ja) 1983-11-26
EP0095148A3 (fr) 1985-12-11
JPS6132664B2 (fr) 1986-07-28

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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Effective date: 19830616

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Designated state(s): DE GB NL

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STAA Information on the status of an ep patent application or granted ep patent

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18D Application deemed to be withdrawn

Effective date: 19851202

RIN1 Information on inventor provided before grant (corrected)

Inventor name: IKARIYA, TOSHIYUKI

Inventor name: IINO, CHUUJI

Inventor name: TAKAHASHI, KIYOHIKO

Inventor name: YANAGISAWA, AKIRA